Hi,
In applying for your Visa in California, do not mention trekking what so ever or you will be required to obtain that permit as well. Mention that you are travellling in Lahore, Islamabad, Karachi and touring sites of historical interest.
There is no need to go to the consulate as they will not issue the Visa on the same day.
they required book statements for 3 months, application, photo, passport, credit card number which is non refundable even if you do not get the Visa.
I have travelled in Pakistan 5 times and they would only issue 1 month so be sure and give them a starting date of when you will need to be in Pakistan.
Wish you all the best. It's worth the effort to visit this beautiful country.
SB
